Triangle calculator
Right Angle Triangle Calculator |
|
| Known | |
| Leg a | |
| Leg b | |
| Hypotenuse c | |
| Angle X | ° (in Degree) |
| Angle Y | ° (in Degree) |
| Results | |
| Hypotenuse c | |
| Leg a | |
| Leg b | |
| Angle X | |
| Angle Y | |
| Area | |
| Perimeter | |
Free Online Right Angle Triangle Calculator — Calculate Sides, Angles, Area & Perimeter
Need to quickly calculate sides of a right-angled triangle, find angles, or determine the area and perimeter? Our free Right Angle Triangle Calculator makes it simple and fast to solve any right triangle problem directly in your browser. Ideal for students, teachers, engineers, and geometry enthusiasts.
How to Use the Triangle Calculator
Follow these simple steps to get your result:
- Select the known values from the dropdown (legs, hypotenuse, or angles).
- Enter the numerical values of the known sides or angles.
- Click Calculate to see the results instantly.
- The calculator will display all unknown sides, angles, area, and perimeter.
- Press Clear to reset the calculator and start over.
Supported Calculations
- Legs a & b — Calculate hypotenuse and angles.
- Leg + Hypotenuse — Find the missing leg, angles, area, and perimeter.
- Angle + Side — Compute remaining sides, angles, area, and perimeter.
- All results — Area and perimeter calculated automatically for any inputs.
Why Use This Right Angle Triangle Calculator?
- ⚡ Instant and accurate calculation of triangle sides, angles, area, and perimeter.
- 📱 Fully responsive and works perfectly on mobile, tablet, and desktop.
- 🧮 Simple and intuitive design — no complicated formulas required.
- 🎯 Ideal for students, teachers, engineers, and anyone studying geometry.
Examples of Triangle Calculations
Example 1: Leg a = 3, Leg b = 4 → Hypotenuse c = 5, Area = 6, Perimeter = 12
Example 2: Leg a = 5, Hypotenuse c = 13 → Leg b = 12, Angles = 22.62° and 67.38°
Example 3: Angle X = 30°, Leg a = 10 → Leg b = 17.32, Hypotenuse = 20, Area = 86.6
Features of Our Triangle Calculator
- 💡 Works instantly in any modern browser — no installation needed.
- 📏 Calculates sides, angles, area, and perimeter for right triangles.
- 🎯 Precise results with up to 2 decimal places.
- 💻 Clean, minimalist design for easy use on any device.
Whether you’re solving a geometry homework problem, designing a triangle structure, or studying trigonometry, this free calculator provides fast and reliable results. Bookmark this tool to calculate right-angle triangles anytime.
FAQ — Right Angle Triangle Calculator
1. How do I calculate the hypotenuse?
Enter the known leg values (a and b), select them in the dropdown, and click Calculate. The calculator will display the hypotenuse instantly.
2. Can I find missing sides if I know an angle and a side?
Yes, select the known angle and side in the dropdown, enter their values, and click Calculate. All missing sides and angles will be displayed.
3. Does this calculator provide area and perimeter?
Yes, it automatically calculates the area and perimeter for any valid input.
4. Is this triangle calculator mobile-friendly?
Absolutely. It works perfectly on smartphones, tablets, and desktops.
5. Do I need to download or install anything?
No, it works instantly in your browser without any downloads or registration.
6. Is this calculator free?
Yes, it is completely free and available online anytime.
